# Mail id's uploding issue and email id add issue

**URL:** <https://forum.mautic.org/t/mail-ids-uploding-issue-and-email-id-add-issue/27467>\
**Category:** Product Support\
**Tags:** mautic-3, mautic-4\
**Created:** [March 22, 2023, 12:10pm UTC](https://forum.mautic.org/t/mail-ids-uploding-issue-and-email-id-add-issue/27467 "2023-03-22T12:10:25Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![ritesh1](https://avatars.discourse-cdn.com/v4/letter/r/57b2e6/32.png) [@ritesh1](https://forum.mautic.org/u/ritesh1)\
**Post date:** [March 22, 2023, 12:10pm UTC](https://forum.mautic.org/t/mail-ids-uploding-issue-and-email-id-add-issue/27467/1 "2023-03-22T12:10:25Z")

</div>

@mauticdeveloper @mauticset @mauticuser1245 @Mauticator @mautic_test @mautic_evolok @Mautist

I am uploading 40000 mail id in matic which is not uploading completely out of this only 25000 is getting uploaded why is this happening can someone help me please and can someone tell me that mail address  
**How many sender mail ids can I add in to send mail from?**

---

<div class="post-metadata">

**Author:** ![joeyk](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/joeyk/32/11164_2.png) [@joeyk](https://forum.mautic.org/u/joeyk)\
**Post date:** [March 22, 2023, 6:34pm UTC](https://forum.mautic.org/t/mail-ids-uploding-issue-and-email-id-add-issue/27467/2 "2023-03-22T18:34:31Z")

</div>

Hi, plz check this in the Mautic Knowledge base:

> **[How to import contacts to Mautic in the background without timing out -...](https://kb.mautic.org/article/how-to-import-contacts-to-mautic-in-the-background-without-timing-out.html)**
>
> How to import large volumes of contacts to Mautic using the background cron job.